Ranua is a municipality of Finland. It is located in the province of Lapland. The municipality has a population of 3,578 (31 August 2024) and covers an area of 3,694.79 square kilometres (1,426.57 sq mi) of which 241.09 km2 (93.09 sq mi) is water. The population density is 1.04 inhabitants per square kilometre (2.7/sq mi).
The municipality is unilingually Finnish.